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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Prevent the cow from getting an infection from the calve
Dairy calves are removed from cow at birth to...
polyestrous
spermatogenesis
things to check for in a breeding soundness exam (BSE)
2. Front feet and head first. (except for hogs and dogs)
#1 cost in production
normal presentation of the fetus
mare estrus cycle
Avg. bull specs
3. Allows extension of penis without fibro-elastic penis
sigmoid flexure
castration
kidney stones also called ________ ___________ can develop in the sigmoid flexure
cervix
4. Parturition is controlled by...
sperm cell
ewe's estrous cycle
Hormones from both the fetus and the mom.
Reasons for gestation length being affected
5. Days which have increasing daylight hours
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6. 4-6 days
mare estrus
reasons for castration
Dairy Cattle Gestation
Size of cow in relation to the amount of milk produced
7. Milk ~305 days - dry 60 days prior to calving
cremaster muscle
Lutinizing Hormone in females
#1 cost in production
Dairy Cattle milking schedule
8. To remove/separate testicles from animal's body before animal reaches puberty
epididymis: definition - 3 parts - 4 functions
testis (gonads)
polyestrous
castration
9. (FSH) causes egg to mature in females
functions of progestrone
sigmoid flexure
Follical Stimulating in females
effects of estrogen
10. Male on one pin and female on other side
libido test (BSE)
sow estrus cycle
semen evaluation (BSE)
cow ovulation
11. 336 days
sow ovulation
mare gestation
ewe estrus cycle
Dairy Cattle milking schedule
12. Why does estrus happen before ovulation?
monestrous
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
cowper's gland
age and castration
13. When are dairy cattle dehorned?
Sperm survival specs
ewe ovulation
eminal vesicles
~1 month
14. Provide nourishment for the developing sperm
ewe gestation
age and castration
sertoli cells
scrotal circumference (BSE)
15. 19-23 (21) days
growth lost from castration methods (knife & band)
things to check for in a breeding soundness exam (BSE)
cow estrus cycle
mare's estrous cycle
16. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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17. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
retractor muscles
Dairy calves are removed from cow at birth to...
sperm cell
colostrum
18. Duct through penis that carries sperm and urine
urethra
Hormones from both the fetus and the mom.
mare gestation
purpose of Breeding Soundness Exam (BSE) for males
19. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
reasons for castration
sperm cell
accessory sex glands
20. Can survive ~7 days in cow. vast majority <48 hours
sperm cell
mare ovulation
Sperm survival specs
van deferens
21. Luteolysis happens because of the ____________ hormone
prostaglandin
cervix
cow estrus
ewe's estrous cycle
22. 114 days
sertoli cells
Dairy Cattle Lactation (standard)
organs used in spermatogenesis
sow gestation
23. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
colostrum
ewe ovulation
Reasons for gestation length being affected
retractor muscles
24. Animal which has been castrated after puberty
stag
Culls bulls earlier (2 reasons)
Culls bulls earlier (2 reasons)
mare ovulation
25. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Culls bulls earlier (2 reasons)
Hormones from both the fetus and the mom.
cow gestation
Size of cow in relation to the amount of milk produced
26. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Bull's fibro-elastic penis
mare's estrous cycle
Holstein Cow
Dairy Cattle milking schedule
27. Implies the amount of estrogen production
retractor muscles
femininity of a heifer
estrus
oviducts
28. 265-285 days
reasons for castration
Dairy Cattle Gestation
Size of cow in relation to the amount of milk produced
ewe's estrous cycle
29. Start of the reproductive tract for the female. located outside of the body
why does the cow need fat deposits during pregnancy?
purpose of Breeding Soundness Exam (BSE) for males
vulva
ewe estrus cycle
30. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
Dairy Cattle milking schedule
burdizzo
cremaster muscle
estrous
31. Duct through penis that carries sperm and urine
urethra
cryptorchid
ewe ovulation
Sperm growth rate
32. 30-38 hours after estrus cycle begins
sow ovulation
estrous
humans: stress level vs sperm
ewe estrus cycle
33. Superior genes are _______ to multiply
ewe estrus cycle
Where livelihood is in agriculture
1. more cost effective - 2. powdered milk is in excess production
Hard
34. 1-2 days
testis (gonads)
mare's estrous cycle
ewe estrus
sertoli cells
35. Depository for semen during insemination. where urine leaves the body
cow estrus
vagina
prostaglandin
Bull's fibro-elastic penis
36. 147 days
Follical Stimulating in males
vagina
ewe gestation
testosterone
37. Actual heat cycle (period)
epididymis: definition - 3 parts - 4 functions
humans: stress level vs sperm
6-8 weeks
estrus
38. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.
why does the cow need fat deposits during pregnancy?
sperm cell
organs used in spermatogenesis
Lutinizing Hormone in males
39. Male on one pin and female on other side
retractor muscles
libido test (BSE)
sertoli cells
rectal palpation (BSE)
40. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
Where livelihood is in agriculture
mare gestation
scrotum
semen evaluation (BSE)
41. 147 days
mare ovulation
eminal vesicles
kidney stones also called ________ ___________ can develop in the sigmoid flexure
ewe gestation
42. 16-20 hours
cow estrus
ewe estrus cycle
ewe estrus
mare estrus
43. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.
Jersey Cow
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
why does the cow need fat deposits during pregnancy?
Mares
44. Sperm is produced here
monorchid
penis proper
van deferens
seminiferous tubules
45. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
4 major reasons for culling dairy cows
things to check for in a breeding soundness exam (BSE)
ewe's estrous cycle
cryptorchid
46. When are steers and heifers weaned from bottle feeding?
pelvis
6-8 weeks
hypothalamus and pituitary gland
Grading choice
47. 16-20 hours
Size of cow in relation to the amount of milk produced
dairy cattle pregnancy check
cow estrus cycle
cow estrus
48. ~60 days before calving
uterus
prostate gland
dry-off time in dairy cattle
prostate gland
49. 283 days
mare gestation
cow gestation
sperm cell
Reasons for gestation length being affected
50. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
prostaglandin
seasonally polyestrous
Culls bulls earlier (2 reasons)
reason for seasonal breeding periods
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